Compare two text snippets or code files with side-by-side and unified diff visualization.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. Zero egress.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
Paste original version into the left/top workspace.
Paste modified version into the right/bottom workspace.
Review green additions and red deletions with patch copy support.
No, all diff computations execute 100% in your local browser memory.
Yes, the line-by-line comparator handles multi-thousand line files smoothly.
Zero-egress companion tools in the Text Utilities suite
Calculate US grade level comprehension using the Automated Readability Index (ARI) formula.
Strip accents and normalize European characters into plain ASCII Latin letters.
Encode and decode reversible ROT13 and custom Caesar cipher text strings.
Format scientific Markdown chemical formulas and mathematical exponents.
